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Green fluorophlogopite fluorescent powder with high quantum yield as well as preparation method and application of green fluorophlogopite fluorescent powder

A fluorophlogopite and high quantum technology, which is applied in the field of green fluorophlogopite phosphor and its preparation, can solve the problems of poor fingerprint development effect and low fluorescence intensity, and achieves low selectivity, broad application prospect and obvious transition area. Effect

Pending Publication Date: 2022-08-05
HEBEI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems in the prior art that the fluorescent intensity of the latent fingerprint detection powder with green light emission is low, which leads to poor fingerprint development effect, the present invention provides a green fluorophlogopite fluorescent powder with high quantum yield and its preparation method and application

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  • Green fluorophlogopite fluorescent powder with high quantum yield as well as preparation method and application of green fluorophlogopite fluorescent powder
  • Green fluorophlogopite fluorescent powder with high quantum yield as well as preparation method and application of green fluorophlogopite fluorescent powder
  • Green fluorophlogopite fluorescent powder with high quantum yield as well as preparation method and application of green fluorophlogopite fluorescent powder

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Embodiment 1

[0042] An embodiment of the present invention provides a method for preparing a high quantum yield green fluorophlogopite phosphor, which at least includes the following steps:

[0043] Step 1. Put 0.1307g K 2 SiF 6 , 0.1435g MgO, 0.0581g Al 2 O 3 , 0.1783g SiO 2 , 0.0067gTb 4 O 7 and 0.0246g CeO 2 After mixing, fully grind in agate mortar for 20min to obtain mixed solid powder;

[0044] Step 2. Put the mixed solid powder in a corundum crucible, under a nitrogen atmosphere, heat up to 1050°C at a rate of 5°C / min in a tube furnace, calcinate for 5.0h, and drop to room temperature at a rate of 3°C / min , grinding to obtain the high quantum yield green fluorophlogopite phosphor (FP:3%Tb 3+ ,12% Ce 3+ phosphor).

Embodiment 2

[0046] An embodiment of the present invention provides a method for preparing a high quantum yield green fluorophlogopite phosphor, which at least includes the following steps:

[0047] Step 1. Put 0.1285g K 2 SiF 6 , 0.1565g MgO, 0.0628g Al 2 O 3 , 0.1751g SiO 2 , 0.0045gTb 4 O 7 and 0.0182g CeO 2 After mixing, fully grind in agate mortar for 20min to obtain mixed solid powder;

[0048] Step 2. Put the mixed solid powder in a corundum crucible, under a nitrogen atmosphere, heat up to 1030°C at a rate of 4°C / min in a tube furnace, calcine for 5.0h, and drop to room temperature at a rate of 2°C / min , grinding to obtain the high quantum yield green fluorophlogopite phosphor (FP: 2% Tb 3+ ,9% Ce 3+ phosphor).

Embodiment 3

[0050] An embodiment of the present invention provides a method for preparing a high quantum yield green fluorophlogopite phosphor, which at least includes the following steps:

[0051] Step 1. Put 0.1405g K 2 SiF 6 , 0.1449g MgO, 0.0576g Al 2 O 3 , 0.1916g SiO 2 , 0.0095gTb 4 O 7 and 0.0242g CeO 2 After mixing, fully grind in agate mortar for 20min to obtain mixed solid powder;

[0052] Step 2. Put the mixed solid powder in a corundum crucible, under nitrogen atmosphere, heat up to 1070°C at a rate of 6°C / min in a tube furnace, calcinate for 4.5h, and drop to room temperature at a rate of 4°C / min , grinding to obtain the high quantum yield green fluorophlogopite phosphor (FP:4%Tb 3+ ,11% Ce 3+ phosphor).

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Abstract

The invention relates to the technical field of fluorescent materials, and particularly discloses green fluorophlogopite fluorescent powder with high quantum yield as well as a preparation method and application of the green fluorophlogopite fluorescent powder. The preparation method of the green fluorophlogopite fluorescent powder comprises the following steps: uniformly mixing potassium fluosilicate, magnesium oxide, aluminum oxide, silicon dioxide, terbium oxide and cerium oxide, and grinding to obtain mixed solid powder; and calcining the mixed solid powder at 1030-1070 DEG C for 4.5-5 hours in an inert atmosphere, cooling, and grinding to obtain the green fluorophlogopite fluorescent powder with high quantum yield. The fluorophlogopite fluorescent powder prepared by the preparation method can clearly show I-level-III-level fingerprint characteristics under the excitation of ultraviolet light, the purpose of displaying latent fingerprints on the surfaces of various base materials is achieved, the fluorescence quantum yield is as high as 78%, the developing effect is obvious, and the fluorophlogopite fluorescent powder has a relatively high application prospect in the fields of forensic medicine, individual identity recognition and the like.

Description

technical field [0001] The invention relates to the technical field of fluorescent materials, in particular to a green fluorophlogopite fluorescent powder with high quantum yield and a preparation method and application thereof. Background technique [0002] As a unique feature of each person, fingerprints are often regarded as the second "identity card" of an individual, and are important evidence for confirming individual identity information in criminal cases. Under normal circumstances, most of the fingerprints left at the crime scene are invisible to the naked eye, and certain technical means are required to make latent fingerprints appear. Among them, the powder visualization method is a traditional, efficient and widely used latent fingerprint visualization method, which has the advantages of low cost, simple operation, time saving and quickness. After long-term development, there are many powder materials that can be used to detect latent fingerprints. However, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/64A61B5/1172
CPCC09K11/77744A61B5/1172Y02B20/00
Inventor 石士考刘俊杉董胜娟
Owner HEBEI NORMAL UNIV
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